Print Aqua-compatible types (#86)

crates/module-interface/src/it_interface/export_it_functions.rs

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2021 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use super::IFunctionSignature;
+use super::ITInterfaceError;
+use super::RIResult;
+
+use marine_it_interfaces::MITInterfaces;
+
+use std::rc::Rc;
+
+pub struct ITExportFuncDescriptor<'n> {
+    pub adapter_function_type: u32,
+    pub name: &'n str,
+}
+
+/// Returns all exported IT functions descriptors.
+pub fn get_export_funcs_descriptors<'i>(
+    mit: &'i MITInterfaces<'_>,
+) -> Vec<ITExportFuncDescriptor<'i>> {
+    // An IT function is exported if it lies in export functions and have implementation.
+    // An export IT function without implementation is a hack and used to call core function from
+    // a Wasm module. This hack is needed because there is only one call instruction in the
+    // interface-types crates and it's needed to distinguish somehow between calling export IT or
+    // core functions. This scheme is a kind of mess and it needs to be refactored one day.
+    mit.implementations()
+        .filter_map(|(adapter_function_type, core_function_type)| {
+            mit.exports_by_type(*core_function_type)
+                .map(|export_function_name| (adapter_function_type, export_function_name))
+        })
+        .map(|(&adapter_function_type, export_function_names)| {
+            export_function_names
+                .iter()
+                .map(move |name| ITExportFuncDescriptor {
+                    adapter_function_type,
+                    name,
+                })
+        })
+        .flatten()
+        .collect::<Vec<_>>()
+}
+
+/// Returns all exported IT functions.
+pub fn get_export_funcs(mit: &MITInterfaces<'_>) -> RIResult<Vec<IFunctionSignature>> {
+    use marine_it_interfaces::ITAstType;
+
+    let funcs_descriptors = get_export_funcs_descriptors(mit);
+
+    funcs_descriptors
+        .into_iter()
+        .map(|descriptor| {
+            let it_type = mit.type_by_idx_r(descriptor.adapter_function_type)?;
+
+            match it_type {
+                ITAstType::Function {
+                    arguments,
+                    output_types,
+                } => {
+                    let signature = IFunctionSignature {
+                        name: Rc::new(descriptor.name.to_string()),
+                        arguments: arguments.clone(),
+                        outputs: output_types.clone(),
+                        adapter_function_type: descriptor.adapter_function_type,
+                    };
+                    Ok(signature)
+                }
+                _ => Err(ITInterfaceError::ITTypeNotFunction(
+                    descriptor.adapter_function_type,
+                )),
+            }
+        })
+        .collect::<RIResult<Vec<IFunctionSignature>>>()
+}